Hydraulic press for laminating wood



3 Sheets-Sheet l P. Q- IGLESIAS HYDRAULIC PRESS FOR LAMINATING WOOD April 13, 1954 Filed March 19. 1955 INVENTOR.

Pedro 0 lg/esi'as Fig. 6

O O. 0 O O O O O O O O O 0 O O 0 O O O April 13, 1954 P. Q. IGLESIAS 2,675,037

HYDRAULIC PRESS FOR LAMINATING woon Filed March 19, 1953 3 Sheets-Sheet 2 noonnuuv o a o o 0 o I... toooovvo 0 O 0 Pedro 0. lg/esias, INVENTOR.

Fig. 2

April 13, 1954 P. Q. IGLESIAS 2,675,037

HYDRAULIC PRESS FOR LAMINA'IING woon Filed March 19, 1955 3 Sheets-Sheet 3 Fig. 7

Fig.4

Pedro 0. lg/esr'as INVENTOR.

mu away 153M Patented Apr. 13, 1954 OFFICE HYDRAULIC PRESS FOR LAMINATING WOOD Pedro Q. Iglesias, J aurez, Chihuahua, Mexico Application March 19, 1953, Serial No. 343,281

Claims.

This invention relates to a hydraulic press for laminating wood and joining small pieces of wood to form a composite lumber product of superior quality.

This invention features the concept of providing a machine for forming composite lumber products which employs hydraulic means for pressing small pieces of wood together. Heat is supplied by blowing heated air into circulation about an upper and lower broiler so that the heated air may pass directly into engagement with the wood to dry any glue or other adhesive used in bonding the pieces of wood.

A furnace is provided for heating air which employs liquid fuel thus eliminating the necessity of large amounts of electrical energy whichbesides being expensive is also comparatively dangerous and when unshielded causes considerable interference in radio communications and in other high frequency broadcast.

The primary purpose of the invention is to utilize lumber waste in factories and lumber mills which is usually burned or otherwise disposed of without realization thereon. comparatively large flat sheets of wood may easily be formed using this waste. Thus, a reduction in the amount of lumber used may result from the utilization of machines constructed in accordance with this invention which will preserve forests. Furthermore, the product produced by this machine is a highly desirable commodity which is superior in many respects to other wood products.

These, together with the various ancillary objects and features of the invention which will become apparent as the following description proceeds, are attained by this hydraulic press for laminating and joining wood, a preferred embodiment of which has been illustrated in the accompanying drawings by way of example only, wherein:

Figure 1 is a front elevational view of the ma chine comprising the present invention;

Figure 2 is a top plan view of this machine with parts being shown in section for a greater detail;

Figure 3 is a vertical sectional view as taken along the plane of line 3-3 in Figure 2, showing the construction of the upper and lower broilers and further illustrating the means in which heated air is circulated about the lumber under treatment;

Figure 4 is a vertical sectional detail view as taken along the plane of line 4-4 of Figure 1, illustrating the construction of the broilers and also illustrating the means for raising and lowering the upper broiler in greatest detail;

Figure 5 is an enlarged detail view of a portion of the lower broiler;

Figure 6 is a plan view illustrating the construction of a portion of the upper broiler;

Figure '7 is a sectional detail view illustrating the furnace and broiler used for supplying heated air to the machine; and

Figure 8 is a diagram illustrating the hydraulic means for raising or lowering the broiler.

With continuing reference to the accompanying drawings wherein like reference numerals designate similar parts throughout the various views, reference numeral ll] generally designates a housing having a suitable configuration and being provided with an inlet mouth l2 and a discharge aperture M at the opposite end thereof. The housing [0 is preferably formed from sheet metal and has an insulative layer 16 of asbestos or the like secured to the inner surfaces thereof. The housing I!) may be mounted on legs I8 and is provided with a lower broiler supporting structure including longitudinal strength members 20 and 22 which are adapted to rigidly support the lower broiler 24. The lower boiler 24 includes a peripheral framework formed by the beams 20 and 22 and by the transverse strength members 25 and 28, and is provided with a grill formed from a mesh of cries-crossing plates which are of substantially greater dimensions with respect to their depth than the width thereof. The lower broiler 24 is therefore of relatively rigid structure which readily permits the circulation of air therethrough. Supported above the lower broiler 26 is an upper broiler 39 which includes a peripheral framework 32 having a plurality of battens 34 extending in spaced parallel relationship. Secured to the battens 34 and to the peripheral framework are a pair of I beams 36 and 38 which extend perpendicularly to the battens 34 and which substantially rigidify the entire upper broiler 30. For raising and lowering the upper broiler 33, there are provided piston rods 40 which are threadedly' adiustably secured within brackets e2 attached to the I beams 36 and 33. These piston rods fill are attached to double acting pistons within cylinders 46 mounted on the housing It. These pistons are actuated by hydraulic pressure entering through conduits as at 46 and as connecting the cylinders-4t with a four-way valve til which connects the conduits with a reservoir 52 and a pressure tank through conduits 5t and 5% respectively] The pressure on the fluid in the hydraulic tank 54 is controlled by a pressure regulator (is of conventional design which actuates the motortZ of a pump 64 pressing them together.

for the furnace 8%.

3 connected by conduit $6 to the reservoir 52. Hence, upon actuation of the valve 50, movement of the upper broiler 39 can be controlled.

Mounted on the side of the housing Hi are a plurality of cylinders 68 which are connected through valve 10 to the pressure tank 54 and the reservoir 52 by means of suitable conduits. Within the cylinders 58 there are pistons which actuate piston rods 12 having pivotally attached thereto by means of pins 14 individual shoes 16 which are adapted to engage strips or pieces of lumber 13 which are positioned within the housing through the mouth l2. These strips 18 are preferably partially or completely coated with a suitable adhesive for bonding these strips with other strips to form a composite wood product. U-pon opening of the switch 10, fluid will flow into the cylinders 68 under pressure thus effectively actuating the pistons to apply pressure horizontally against the wood pieces 18 Likewise, the upper broiler 3! will be pressed downwardly due to actuation of the piston rods 40 further applying pressure on the wood pieces.

It has been found that the drying action of the adhesive and the bonding thereby of the strips of wood can be accelerated by the circulation of heated air within the housing Hi. There is therefore provided a furnace 80 having a blower 82 mounted thereon which drives hot air through a serpentine conduit 84 mounted within the furnace 89. This heats the air within the conduit 84, once it is transmitted through a pipe 8-5 and into the housing Ill. A liquid fuel injection system including injectors 88 are provided Thus, there is eliminated the necessity for electric heating means and other electrical equipment which if applied to an apparatus of this type would usually result in severe and costly accidents and breakdowns.

for the required period of time, the valves 50 and H1 may be opened and the composite Wood product is pushed out by inserting additional .strips of wood. It is to be understood. that if in m it desired, the cylinders 68 may be provided with double acting pistons or if found feasible,

the upper broiler may be lifted by other means than the hydraulic means employed in conjunction with the blower applying the pressure. A distinct advantage of the hydraulic means for applying pressure is that there is considerable pressure applied but of a uniform and continuous nature.

Since from the foregoing the construction and "advantages of this hydraulic press for laminating wood are readily apparent, further description is believed to be unnecessary,

However, since numerous modifications will readily occur to those skilled in the art after a consideration of the foregoing specification and accompanying drawings, it is not intended to limit the invention to the precise embodiment ,shown and described, but all suitable modifications and equivalents may readily be resorted to which fall within the scope of the appended claims.

What is claimed as new is as follows: 1. A hydraulic press for laminating wood,

4 comprising a housing, a lower broiler plate rigidly mounted in said housing, an upper broiler plate, means for raising, lowering, and applying downward pressure on said upper broiler plate, means for applying horizontal pressure on wood supported by said lower broiler plate, and means for introducing heated air to said housing, said upper broiler plate including a peripheral frame, battens secured to said frame flush with the bottom edge thereof, and cross beams overlying, and extending perpendicularly to and secured to said battens.

2. A hydraulic press for laminating wood, comprising a housing, a lower broiler plate rigidly mounted in said housing, an upper broiler plate, means for raising, lowering, and applying downward pressure on said upper broiler plate, means for applying horizontal pressure on wood supported by said lower broiler plate, and means for introducing heated air to said housing, said upper broiler plate including a peripheral frame, battens secured to said frame flush with the bottom edge thereof, and cross beams overlying, and extending perpendicularly to and secured to said battens, said means for raising and lowering and applying pressure to said upper broiler including hydraulically actuated pistons secured to said beams.

3. A hydraulic press for laminating wood, comprising a housing, a lower broiler plate rigidly mounted in said housing, an upper broiler plate, means for raising, lowering, and applying downward pressure on said upper broiler plate, means for applying horizontal pressure on wood supported by said lower broiler plate, and means for introducing heated air to said housing, said lower broiler plate comprising a relatively rigid structure having a grill arrangement for permitting passage of heated air therethrough, said upper broiler plate including a peripheral frame, battens secured to said frame flush with the bottom edge thereof, and cross beams overlying, and extending perpendicularly to and secured to said battens.

' 4. A hydraulic press for laminating wood, comprising a housing, a lower broiler plate rigidly mounted in said housing, an upper broiler plate, means for raising, lowering, and applyingdownward pressure on said upper broiler plate, means for applying horizontal pressure on wood supported by said lower broiler plate, and means for introducing heated air to said housing, said lower broiler plate comprising a relatively rigid structure having a grill arrangement for permit, ting passage of heated air therethrough, said upper broiler plate including a peripheral frame, battens secured to said frame flush with the bottom edge thereof, and cross beams overlying and extending perpendicularly to and secured to said battens, saidmeans for raising, lowering, and applying pressure to said upper broiler including hydraulically actuated pistons secured to said beams.

, 5. A hydraulic press for laminating wood, comprising a housing, a lower broiler plate rigidly mounted in said housing, an upper broiler plate, means for raising, lowering, and applying downward pressure on said upper broiler plate, means for applying horizontal pressure on wood supported by said lower broiler plate, and means for introducing heated air to said housing, said lower broiler plate comprising a relatively rigid structure having a grill arrangement for permitting passage ofheatedair therethrough, said upper 5 6 broiler plate including a peripheral frame, bat- References Cited in the file of this patent tens Secured t0 Said frame fiuSh bottoln edge thereof, and cross beams overlying and ex- T tending perpendicularly to and secured to said hufnber Name Date battens, said means for raising, lowering, and 5 550,333 1907 applying pressure to said upper broiler including 837,733 Francls May 19, 1903 hydraulically actuated pistons secured to said 2,183,599 Welch 1939 beams, said means for applying horizonta1 pres- 23211755 Y June 15, 1943 sure including a plurality of hydraulically oper- 2,526,342 Frls'ch 1950 ated pistons having individual shoes pivotally 10 2,593,691 Onsnld 22, 1952 secured theret Pasquier l6, 

